bowenli86 commented on a change in pull request #8703: [FLINK-12807][hive]Support Hive table columnstats related operations in HiveCatalog URL: https://github.com/apache/flink/pull/8703#discussion_r293554169
########## File path: flink-connectors/flink-connector-hive/src/main/java/org/apache/flink/table/catalog/hive/util/HiveCatalogUtil.java ########## @@ -0,0 +1,235 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.flink.table.catalog.hive.util; + +import org.apache.flink.table.catalog.stats.CatalogColumnStatisticsDataBase; +import org.apache.flink.table.catalog.stats.CatalogColumnStatisticsDataBinary; +import org.apache.flink.table.catalog.stats.CatalogColumnStatisticsDataBoolean; +import org.apache.flink.table.catalog.stats.CatalogColumnStatisticsDataDate; +import org.apache.flink.table.catalog.stats.CatalogColumnStatisticsDataDouble; +import org.apache.flink.table.catalog.stats.CatalogColumnStatisticsDataLong; +import org.apache.flink.table.catalog.stats.CatalogColumnStatisticsDataString; +import org.apache.flink.table.types.DataType; +import org.apache.flink.table.types.logical.BigIntType; +import org.apache.flink.table.types.logical.BooleanType; +import org.apache.flink.table.types.logical.CharType; +import org.apache.flink.table.types.logical.DateType; +import org.apache.flink.table.types.logical.DoubleType; +import org.apache.flink.table.types.logical.FloatType; +import org.apache.flink.table.types.logical.IntType; +import org.apache.flink.table.types.logical.LogicalType; +import org.apache.flink.table.types.logical.SmallIntType; +import org.apache.flink.table.types.logical.TimestampType; +import org.apache.flink.table.types.logical.TinyIntType; +import org.apache.flink.table.types.logical.VarCharType; + +import org.apache.hadoop.hive.metastore.api.BinaryColumnStatsData; +import org.apache.hadoop.hive.metastore.api.BooleanColumnStatsData; +import org.apache.hadoop.hive.metastore.api.ColumnStatistics; +import org.apache.hadoop.hive.metastore.api.ColumnStatisticsData; +import org.apache.hadoop.hive.metastore.api.ColumnStatisticsDesc; +import org.apache.hadoop.hive.metastore.api.ColumnStatisticsObj; +import org.apache.hadoop.hive.metastore.api.DateColumnStatsData; +import org.apache.hadoop.hive.metastore.api.DoubleColumnStatsData; +import org.apache.hadoop.hive.metastore.api.FieldSchema; +import org.apache.hadoop.hive.metastore.api.LongColumnStatsData; +import org.apache.hadoop.hive.metastore.api.Partition; +import org.apache.hadoop.hive.metastore.api.StorageDescriptor; +import org.apache.hadoop.hive.metastore.api.StringColumnStatsData; +import org.apache.hadoop.hive.metastore.api.Table; +import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +/** + * Utils to for HiveCatalog. + */ +public class HiveCatalogUtil { + private static final Logger LOG = LoggerFactory.getLogger(HiveCatalogUtil.class); + + private HiveCatalogUtil() {} + + /** + * Create a map of Flink column stats from the given Hive column stats. + */ + public static Map<String, CatalogColumnStatisticsDataBase> createCatalogColumnStats(List<ColumnStatisticsObj> hiveColStats) { + Map<String, CatalogColumnStatisticsDataBase> colStats = new HashMap<>(); + + if (hiveColStats != null) { + for (ColumnStatisticsObj colStatsObj : hiveColStats) { + CatalogColumnStatisticsDataBase columnStats = + createTableColumnStats( + HiveTypeUtil.toFlinkType(TypeInfoUtils.getTypeInfoFromTypeString(colStatsObj.getColType())), + colStatsObj.getStatsData()); + + if (colStats != null) { + colStats.put(colStatsObj.getColName(), columnStats); + } + } + } + + return colStats; + } + + /** + * Create columnStatistics from the given Hive column stats of a hive table. + */ + public static ColumnStatistics createTableColumnStats( + Table hiveTable, + Map<String, CatalogColumnStatisticsDataBase> colStats) { + ColumnStatisticsDesc desc = new ColumnStatisticsDesc(true, hiveTable.getDbName(), hiveTable.getTableName()); + return createColumnStatistics(colStats, hiveTable.getSd(), desc); + } + + /** + * Create columnStatistics from the given Hive column stats of a hive partition. + */ + public static ColumnStatistics createPartitionColumnStats( + Partition hivePartition, + String partName, + Map<String, CatalogColumnStatisticsDataBase> colStats) { + ColumnStatisticsDesc desc = new ColumnStatisticsDesc(false, hivePartition.getDbName(), hivePartition.getTableName()); + desc.setPartName(partName); + return createColumnStatistics(colStats, hivePartition.getSd(), desc); + } + + private static ColumnStatistics createColumnStatistics( + Map<String, CatalogColumnStatisticsDataBase> colStats, + StorageDescriptor sd, + ColumnStatisticsDesc desc) { + List<ColumnStatisticsObj> colStatsList = new ArrayList<>(); + + for (FieldSchema field : sd.getCols()) { + String hiveColName = field.getName(); + String hiveColType = field.getType(); + + if (colStats.containsKey(hiveColName)) { + CatalogColumnStatisticsDataBase flinkColStat = colStats.get(field.getName()); + ColumnStatisticsData statsData = + getColumnStatisticsData(HiveTypeUtil.toFlinkType(TypeInfoUtils.getTypeInfoFromTypeString(hiveColType)), flinkColStat); + ColumnStatisticsObj columnStatisticsObj = new ColumnStatisticsObj(hiveColName, hiveColType, statsData); + colStatsList.add(columnStatisticsObj); + } + } + + return new ColumnStatistics(desc, colStatsList); + } + + /** + * Create Flink ColumnStats from Hive ColumnStatisticsData. + */ + private static CatalogColumnStatisticsDataBase createTableColumnStats(DataType colType, ColumnStatisticsData stats) { + if (stats.isSetBinaryStats()) { + BinaryColumnStatsData binaryStats = stats.getBinaryStats(); + return new CatalogColumnStatisticsDataBinary( + binaryStats.getMaxColLen(), + binaryStats.getAvgColLen(), + binaryStats.getNumNulls()); + } else if (stats.isSetBooleanStats()) { + BooleanColumnStatsData booleanStats = stats.getBooleanStats(); + return new CatalogColumnStatisticsDataBoolean( + booleanStats.getNumFalses(), + booleanStats.getNumFalses(), + booleanStats.getNumNulls()); + } else if (stats.isSetDateStats()) { + DateColumnStatsData dateStats = stats.getDateStats(); + return new CatalogColumnStatisticsDataDate( + new org.apache.flink.table.catalog.stats.Date(dateStats.getLowValue().getDaysSinceEpoch()), + new org.apache.flink.table.catalog.stats.Date(dateStats.getHighValue().getDaysSinceEpoch()), + dateStats.getNumDVs(), + dateStats.getNumNulls()); + } else if (stats.isSetDoubleStats()) { + DoubleColumnStatsData doubleStats = stats.getDoubleStats(); + return new CatalogColumnStatisticsDataDouble( + doubleStats.getLowValue(), doubleStats.getHighValue(), + doubleStats.getNumDVs(), doubleStats.getNumNulls()); + } else if (stats.isSetLongStats()) { + LongColumnStatsData longColStats = stats.getLongStats(); + return new CatalogColumnStatisticsDataLong( + longColStats.getLowValue(), longColStats.getHighValue(), + longColStats.getNumDVs(), longColStats.getNumNulls()); + } else if (stats.isSetStringStats()) { + StringColumnStatsData stringStats = stats.getStringStats(); + return new CatalogColumnStatisticsDataString( + stringStats.getMaxColLen(), stringStats.getAvgColLen(), + stringStats.getNumDVs(), stringStats.getNumNulls()); + } else { + LOG.warn("Flink does not support converting ColumnStatisticsData '{}' for Hive column type '{}' yet.", stats, colType); + return null; + } + } + + + /** + * Convert Flink ColumnStats to Hive ColumnStatisticsData according to Hive column type. + * Note we currently assume that, in Flink, the max and min of ColumnStats will be same type as the Flink column type. + * For example, for SHORT and Long columns, the max and min of their ColumnStats should be of type SHORT and LONG. + */ + private static ColumnStatisticsData getColumnStatisticsData(DataType colType, CatalogColumnStatisticsDataBase colStat) { + LogicalType colLogicalType = colType.getLogicalType(); + if (colLogicalType instanceof CharType || colLogicalType instanceof VarCharType) { Review comment: `StringType` too? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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